Aman stands on a platform that is rotating (without friction) with an angular speed of 2.00 rev/s; his arms are outstretched and he holds a brick in each hand. the rotational inertia of the system consisting of the man, bricks, and platform about the central axis is 7.55 kg·m2. if by moving the bricks the man decreases the rotational inertia of the system to 1.22 kg·m2, (a) what is the resulting angular speed of the platform and (b) what is the ratio of the new kinetic energy of the system to the original kinetic energy?
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Physics, 21.06.2019 18:10
The difference between two numbers is 15. when twice the smaller number is subtracted from three times the larger number, the difference is 58.what is the larger number?
Answers: 1
Physics, 22.06.2019 16:50
Aresistor with an unknown resistance is connected in parallel to a 9 ω resistor. when both resistors are connected in parallel to an emf source of 21 v, the current through the unknown resistor is measured with an ammeter to be 4 a. what is the resistance of the unknown resistor? answer in units of ω.
Answers: 3
Aman stands on a platform that is rotating (without friction) with an angular speed of 2.00 rev/s;...
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